Which System Maintains the Volume and Composition of Body Fluids

Question

Which system maintains the volume and composition of body fluids?  
A) Integumentary
B) Immune
C) Digestive
D) Urinary
E) Circulatory

Accepted Answer

The urinary system is responsible for maintaining the volume and composition of body fluids through the filtration of metabolic waste and excess ions from the blood, and the production and excretion of urine. The integumentary system primarily functions in protecting the body from external damage, the immune system defends the body against infection and disease, the digestive system processes food for energy and nutrient absorption, and the circulatory system transports blood throughout the body.